The deadline to pre-register has passed. However, in Minnesota, you can still...

In order to register at your polling place, you need to bring one proof of residence which can be...

ID with current name and address

or

Photo ID and a document with current name and address

or

Registered voter who can confirm your address

or

College student ID with housing list

or

Valid registration in the same precinct

or

Notice of late registration

or

Staff person of a residential facility

Find out more here.